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  <title>返回指定文件的大小</title>

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</div><hr /><div id="function.ftp-size" class="refentry">
   <div class="refnamediv">
    <h1 class="refname">ftp_size</h1>
    <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">ftp_size</span> &mdash; <span class="dc-title">返回指定文件的大小</span></p>

   </div>
   <div class="refsect1 description" id="refsect1-function.ftp-size-description">
    <h3 class="title">说明</h3>
    <div class="methodsynopsis dc-description">
     <span class="type">int</span> <span class="methodname"><strong>ftp_size</strong></span>
      ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$ftp_stream</code></span>
     , <span class="methodparam"><span class="type">string</span> <code class="parameter">$remote_file</code></span>
     )</div>

    <p class="para rdfs-comment">
     <span class="function"><strong>ftp_size()</strong></span> 函数以字节返回远程文件
     <em><code class="parameter">remote_file</code></em> 的大小。如果指定文件不存在或发生错误，则返回
     -1。有些 FTP 服务器可能不支持此特性。
    </p>
    <blockquote class="note"><p><strong class="note">Note</strong>: 
     <p class="para">
      获取成功返回文件大小，否则返回 -1。
     </p> 
    </p></blockquote>
   </div>

   <div class="refsect1 parameters" id="refsect1-function.ftp-size-parameters">
    <h3 class="title">参数</h3>
    <p class="para">
     <dl>

      
       <dt>
<em><code class="parameter">ftp_stream</code></em></dt>

       <dd>

        <p class="para">
         FTP 连接资源。
        </p>
       </dd>

      
      
       <dt>
<em><code class="parameter">remote_file</code></em></dt>

       <dd>

        <p class="para">
         远程文件。
        </p>
       </dd>

      
     </dl>

    </p>
   </div>

   <div class="refsect1 returnvalues" id="refsect1-function.ftp-size-returnvalues">
   <h3 class="title">返回值</h3>
   <p class="para">
    执行成功返回文件大小，失败返回 -1。
   </p>
   </div>

   <div class="refsect1 examples" id="refsect1-function.ftp-size-examples">
    <h3 class="title">范例</h3>
     <p class="para">
     <div class="example" id="example-4214">
      <p><strong>Example #1 <span class="function"><strong>ftp_size()</strong></span> 例子</strong></p>
      <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$file&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">'somefile.txt'</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">//&nbsp;set&nbsp;up&nbsp;basic&nbsp;connection&nbsp;<br /></span><span style="color: #0000BB">$conn_id&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">ftp_connect</span><span style="color: #007700">(</span><span style="color: #0000BB">$ftp_server</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//&nbsp;login&nbsp;with&nbsp;username&nbsp;and&nbsp;password<br /></span><span style="color: #0000BB">$login_result&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">ftp_login</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn_id</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$ftp_user_name</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$ftp_user_pass</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//&nbsp;get&nbsp;the&nbsp;size&nbsp;of&nbsp;$file<br /></span><span style="color: #0000BB">$res&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">ftp_size</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn_id</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$file</span><span style="color: #007700">);<br /><br />if&nbsp;(</span><span style="color: #0000BB">$res&nbsp;</span><span style="color: #007700">!=&nbsp;-</span><span style="color: #0000BB">1</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"size&nbsp;of&nbsp;</span><span style="color: #0000BB">$file</span><span style="color: #DD0000">&nbsp;is&nbsp;</span><span style="color: #0000BB">$res</span><span style="color: #DD0000">&nbsp;bytes"</span><span style="color: #007700">;<br />}&nbsp;else&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"couldn't&nbsp;get&nbsp;the&nbsp;size"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #FF8000">//close&nbsp;the&nbsp;conntion<br /></span><span style="color: #0000BB">ftp_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn_id</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
      </div>

     </div>
    </p>
   </div>

   <div class="refsect1 seealso" id="refsect1-function.ftp-size-seealso">
   <h3 class="title">参见</h3>
   <p class="para">
    <ul class="simplelist">
     <li class="member"><span class="function"><a href="function.ftp-rawlist.html" class="function" rel="rdfs-seeAlso">ftp_rawlist()</a> - 返回指定目录下文件的详细列表</span></li>
    </ul>
   </p>
   </div>

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